This fountain pen is specially designed for Manga drawing purposes. FO1 nib is between a G Pen nib and a Mapping pen nib. The ink does not bleed when used with Copic/Copic Sketch/Copic Ciao when dry.(Does not suit for water colour) * To achieve best results with Copic Drawing Pen, please do not apply heavy hand pressure, this can cause the ink to dry during a stroke.